Fastener for meeting-rails of sashes



(ModeL) I W. P. DODSON.

FASTENBR FOR MEETING RAILS 0]? SASHES. N o ."368 ,997. Patented Aug. 30, 1887.

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UNITED STATES PATENT QFFICEOV WILSON r. DODSON, or PHILADELPHIA, PENNSYLVANIA.

FASTENER FOROM/EETIINLG-RAILS OF SASHES.

SPECIFICATION forming part of Letters Patent No. 368,997, dated August 30, 1887.

Application filed September 2, 1886. Serial No. 212.529. (ModeL) To aZZ whom it may concern.-

Be it known that I, WILSON P. DonsoN, a

citizen of the United States, and a resident of Figure 1 represents the casing A, in which is the slot B, which is tobe plaeed on the'top of the lower sash, and which contains the bolt O, having a spiral handleyD, and a spiral finger or point,E, advanced as in action. Fig. 2 represents the keeper F, which is fastened on the top ofthe-lower rail of the upper sash. Fig. 3 represents the casing A alone, showing the slot B. Fig. 4 represents the bolt 0, with its handleDand spiral finger or point E. Fig. 5 is a front view of the keeper F, showing the beveled projection G withinit, which engages with the spiral finger or point of the bolt'O. Fig. 6 is a bottom plan view'of the same. Fig. 7 is a view of the whole device joined as in action, holding the sashes together.

It willbe observed that the slot B in the casing A isa cam controlling the forward motion of the bolt when it is revolved by its handle, being effectively a female screw-thread, while the handle is an effective male thread, and that it is partly diagonal and partly transverse, so that when the bolt is revolved by its handle it has in one part of its revolution a longitudinal motion and in the other part only a rotary motion. 7

When the handle is brought down upon the side on which the cam-slot is diagonal,the bolt is withdrawn entirely within the casing. When the bolt has made a quarter-turn, it is advanced by the movement of .the handle within the cam-slot-,so that it enters the keeper F, and its spiral point is ready to engage with the beveled projection within the keeper.

While it makes the next quarter-turn its movement is entirely rotary, and its point, engaging with the projection within the keeper, draws upon it and binds the two sashes firmly together.

As-shown in Fig. 5, and especially in Fig. 7, the keeper F may be made higher than the casing A, which is done for the reason that it frequently happens that the lower sash will not go entirely down or the upper sash entirely up, and this irregularity is thus allowed for when desired. I

The handle is shown as having a spiral or twisted shank and aflat thumb-piece arranged parallel to the axis of the bolt, and by this construction I am enabled to make the parts separately and assemble them when used, the flattened thumb-piece and twisted handle being readily passed through the slot in the casing.

Without limiting myself to the precise construction and arrangement of parts shown, I claim- 1. A sash-fastener comprising acasing having a slot extending for a part of its length obliquely, and for the remaining part transversely, of the casing, a bolt within said casing, a handle having a spiral or twisted shank and. fiat thun1b-piece connected to said bolt and passing through the slot to contact with 2. In a sash-fastener, a casing having a slot extending for a part of its length obliquely, and for the remaining part transversely, of said casing, a bolt within said casing having aforwardly-projecting spirally-arrangedfinger to engage a keeper, and a handle having a spiral or 'twisted shank and flat thumb-piece projecting through said slot to engage the sides thereof, in combination with a keeper comprising a casing having an inwardly-projecting portion inclined upon one side to engage thespiral finger of the bolt, substantially as described.

In testimony whereofl have signed my name to this specification in the presence of two subscribing witnesses.

WILSON P. DODSON.

Witnesses:

It. H. NORTH, WM. V. MASSEY. 

